t flip flop

Discussion in 'The Projects Forum' started by ayovi, Feb 24, 2014.

  1. ayovi

    Thread Starter New Member

    Feb 24, 2014
    4
    0
    Hi
    can anyone suggest me a T-flip flop or a JK flip flop that work in the frequency range 0-100MHz
     
  2. crutschow

    Expert

    Mar 14, 2008
    13,003
    3,232
    A high speed CMOS JK flip flop such as the 74VHC112 should work for you. It's rated for a minimum clock speed of 110MHz @ 3.3V and 150MHz @5V.
     
  3. ayovi

    Thread Starter New Member

    Feb 24, 2014
    4
    0
    Will this IC work at 100MHz at 3.3V
     
  4. ayovi

    Thread Starter New Member

    Feb 24, 2014
    4
    0
    This IC is having a min freq of 100MHz.
    I need an IC that work between 0 and 100MHz.
    Is this IC suitable for the purpose
     
    Last edited: Feb 24, 2014
  5. Papabravo

    Expert

    Feb 24, 2006
    10,140
    1,789
    See the previous post. It will work from DC(0 frequency) up to 110 MHz. at 3.3 Volts.
     
  6. Papabravo

    Expert

    Feb 24, 2006
    10,140
    1,789
    Do you know the difference between min and max? Apparently not. The IC is suitable for your purpose as far as we know. What else are you not telling us?
     
  7. MrChips

    Moderator

    Oct 2, 2009
    12,440
    3,361
    min and max sometimes confuse a lot of people including the spec writers themselves.

    100MHz min is the specs of the max operating frequency. Get it?
     
  8. crutschow

    Expert

    Mar 14, 2008
    13,003
    3,232
    It's confusing, but the MIN frequency is the highest frequency that the device is guaranteed to operate. The minimum operating frequency is 0Hz for most standard logic devices (unless otherwise stated).
     
  9. ayovi

    Thread Starter New Member

    Feb 24, 2014
    4
    0
    ok.
    Thank you
     
  10. rc3po

    Member

    Feb 12, 2014
    56
    1
    Confusing??
    It sounds stupid to me. To call the max the min is the dumbest thing I've heard of since I started learning electronics...
     
  11. MrChips

    Moderator

    Oct 2, 2009
    12,440
    3,361
    It might seem stupid to you.

    But this is your guarantee from the manufacturer.
    Here is an example. You want to purchase a fast race car that can do 300 mph.
    The manufacturer guarantees to you that the minimum MAX SPEED is 350 mph
    and the maximum MAX SPEED is 400 mph.

    Or another example. You want a car that can go a certain distance on a tank of gas.
    The manufacturer's guarantee to you is the minimum MAX RANGE is 550 miles.
    The typical MAX RANGE is 650 miles.

    Get it now?
     
  12. Papabravo

    Expert

    Feb 24, 2006
    10,140
    1,789
    When you understand that operating characteristics of a device are not encapsulated in a single number, but rather a range or distribution of values, as a designer of circuits would it just might seem less stupid to you.
     
  13. rc3po

    Member

    Feb 12, 2014
    56
    1
    Ok. Then they should call it the "min/max".
     
  14. Papabravo

    Expert

    Feb 24, 2006
    10,140
    1,789
    Yeah....like they'd do that just for you.
     
  15. rc3po

    Member

    Feb 12, 2014
    56
    1
    I'm just saying there are ways to try to make things less confusing. Min/Max sounds pretty simple to me.
     
  16. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,670
    804
    But they DO call it that. The datasheet says that f.max - maximum clock frequency - has minimum of 100MHz, in other words f.max is guaranteed to be at least 100Mhz.
     
Loading...